This review takes a historical perspective on concepts in the psychology of motivation and emotion, and surveys recent developments, debates and applications. Old debates over emotion have recently risen again. For example, are emotions necessarily subjective feelings? Do animals have emotions? I review evidence that emotions exist also as core psychological processes, which have objectively detectable features, and which can occur either with subjective feelings or without them. Evidence is offered also that studies of emotion in animals can give new (...) insights into human emotions. Beyond emotion, motivation concepts also have changed over decades, and debates still continue. Motivation was once thought in terms of aversive drives, and reward was thought of in terms of drive reduction. Motivation-as-drive concepts were largely replaced by motivation-as-incentive concepts, yet aversive drive concepts still occasionally surface in motivation neuroscience today. Among incentive motivation concepts, incentive salience is a core process, mediated by brain mesocorticolimbic systems (dopamine-related systems) and sometimes called ‘wanting’ (in quotation marks), to distinguish it from cognitive forms of desire (wanting without quotation marks). Incentive salience as ‘wanting’ is separable also from pleasure ‘liking’ for the same reward, which has important implications for several human clinical disorders. Ordinarily, incentive salience adds motivational urgency to cognitive desires, but ‘wanting’ and cognitive desires can dissociate in some conditions. Excessive incentive salience can cause addictions, in which excessive ‘wanting’ can diverge from cognitive desires. Conversely, lack of incentive salience may cause motivational forms of anhedonia in depression or schizophrenia, whereas a negatively-valenced form of ‘fearful salience’ may contribute to paranoia. Finally, negative ‘fear’ and ‘disgust’ have both partial overlap but also important neural differences. (shrink)

Arguably, emotion is always valenced—either pleasant or unpleasant—and dependent on the pleasure system. This system serves adaptive evolutionary functions; relying on separable wanting, liking, and learning neural mechanisms mediated by mesocorticolimbic networks driving pleasure cycles with appetitive, consummatory, and satiation phases. Liking is generated in a small set of discrete hedonic hotspots and coldspots, while wanting is linked to dopamine and to larger distributed brain networks. Breakdown of the pleasure system can lead to anhedonia and other features of affective disorders. (...) Eudaimonia and well-being are difficult to study empirically, yet whole-brain computational models could offer novel insights potentially linking eudaimonia to optimal metastability in the pleasure system. (shrink)

We aim to find a middle path between disease models of addiction, and those that treat addictive choices as choices like any other. We develop an account of the disease element by focussing on the idea that dopamine works primarily to lay down dispositional intrinsic desires. Addictive substances artifically boost the dopamine signal, and thereby lay down intrinsic desires for the substances that persist through withdrawal, and in the face of beliefs that they are worthless. The result is cravings that (...) are largely outside the control of the addict. But this does not mean that addicts are bound to act on such cravings, since they typically retain their faculty of self-control. The issue is one of difficulty not impossibility. Controlling an addictive craving is exceedingly demanding. (shrink)

Different brain mechanisms seem to mediate wanting and liking for the same reward. This may have implications for the modular nature of mental processes, and for understanding addictions, compulsions, free will and other aspects of desire. A few wanting and liking phenomena are presented here, together with discussion of some of these implications.

Where does normal brain or psychological function end, and pathology begin? The line can be hard to discern, making disease sometimes a tricky word. In addiction, normal ‘wanting’ processes become distorted and excessive, according to the incentive-sensitization theory. Excessive ‘wanting’ results from drug-induced neural sensitization changes in underlying brain mesolimbic systems of incentive. ‘Brain disease’ was never used by the theory, but neural sensitization changes are arguably extreme enough and problematic enough to be called pathological. This implies that ‘brain disease’ (...) can be a legitimate description of addiction, though caveats are needed to acknowledge roles for choice and active agency by the addict. Finally, arguments over ‘brain disease’ should be put behind us. Our real challenge is to understand addiction and devise better ways to help. Arguments over descriptive words only distract from that challenge. (shrink)

This article joins with others in the same issue to celebrate the career of Robert B. Zajonc who was a broad, as well as a deeply talented, psychologist. Beyond his well-known focus in social psychology, the work of Zajonc also involved, at one time or another, forays into nearly every other subfield of psychology. This article focuses specifically on his studies that extended into biopsychology, which deserve special highlighting in order to be recognized alongside his many major achievements in emotion (...) and related social topics. The biopsychological focus is offered here in the hope that all his diverse contributions be savored together when celebrating the complete psychology of Robert Zajonc. (shrink)

The pursuit of happiness is a preoccupation for many people — and probably has been ever since the emergence of Homo sapiens sapiens. The scientific understanding of the brain basis of happiness and its pursuit is, however, still in its infancy. Here we focus on recent scientific research on the closely related concepts of pleasure and desire, and discuss their underlying neural mechanisms and their roles in happiness. We also speculate on potential contributions of the brain's default networks to orchestrating (...) cognitive aspects of meaningfulness that are important to happiness. Finally, we discuss how the lack of pleasure, anhedonia, is a central feature of emotional disorders such as depression and thus perhaps the most important obstacle to happiness for many people. (shrink)

Current computational models predict reward based solely on learning. Real motivation involves that but also more. Brain reward systems can dynamically generate incentive salience, by integrating prior learned values with even novel physiological states (e.g., natural appetites; drug-induced mesolimbic sensitization) to cause intense desires that were themselves never learned. We hope future computational models may capture this too.

Heyman explains useful ways to bring addictive drug use under environmental control. We doubt that relapse is explained by drug features such as immediate reinforcement, clouding of judgment, and so forth. Relapse may require explanation in terms of enduring sensitization of incentive neural substrates, but even if its causal assumptions are wrong, Heyman's model makes useful predictions for behavioral control.

The pursuit of happiness is a preoccupation for many people — and probably has been ever since the emergence of Homo sapiens sapiens. The scientific understanding of the brain basis of happiness and its pursuit is, however, still in its infancy. Here we focus on recent scientific research on the closely related concepts of pleasure and desire, and discuss their underlying neural mechanisms and their roles in happiness. We also speculate on potential contributions of the brain's default networks to orchestrating (...) cognitive aspects of meaningfulness that are important to happiness. Finally, we discuss how the lack of pleasure, anhedonia, is a central feature of emotional disorders such as depression and thus perhaps the most important obstacle to happiness for many people. (shrink)

This article focuses on the substantial progress in understanding the psychology and neurobiology of sensory pleasure that has been made over the last decade. The link between pleasure and happiness has a long history in psychology. The growing evidence for the importance of affect in psychology and neuroscience shows a scientific account that involves hedonic pleasures and displeasures. A neurobiological understanding is required of how positive and negative effects are balanced in the brain. The article surveys developments in understanding brain (...) mechanisms of pleasure. It identifies a number of brain regions that are important in the brain's hedonic networks, and speculated on potential interaction with eudaimonic networks. The scientific study of pleasure and affect demonstrates the evolution of emotions and affective expressions, and suggests that these are adaptive responses to environmental situations. (shrink)

Two issues are raised. (1) What is the nature of the drug effect Heyman thinks confers value to drugs? (2) What is the evidence that drug use decreases the value of drugs and of conventional incentives over the long-term? There is considerable evidence for the opposite; a persistent increase in the sensitivity of neural systems that mediate drug value.